Why calculated elapsed time of function 'ar' is different with function 'tic toc' and 'timeit'?

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GeunHwan Kim 2019-3-8

评论： GeunHwan Kim 2019-3-10

I want to compare computation complexity of Yule-Walker Method and other algorithm.

At firtst, I write the 2 codes below,

1) Calculate elapsed time using 'tic toc' function

tic;

ar(Test_Signal,N,'yw');

toc;

2) Calculate elapsed time using 'timeit' function

ff = @() ar(Test_Signal,N,'yw');

timeit(ff)

and results shows huge difference

1) 0.754736s

2) 0.0060s

Which result is correct? and how can I use this results with metric of computational complexity of algorithm?

Walter Roberson 2019-3-9

You should probably use timeit(ff, 0) but that should not matter much.

GeunHwan Kim 2019-3-10

Thank you Walter!

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